1. 将页面所需数据做保存

        localStorage.setItem('pageIndex', String(this.pageIndex));

        localStorage.setItem('searchKey', this.keyword);

        localStorage.setItem('searchStatus', String(this.stateIndex));

2. 返回当前页面后在 ngOnInit()方法中取出存放在本地缓存的数据

ngOnInit() {
  this.pageIndex = Number(localStorage.getItem('pageIndex')) || 1;
  this.searchKey = localStorage.getItem('searchKey') || '';
  this.searchStatus = Number(localStorage.getItem('searchStatus')) || 1;
}